The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
Free tracker included with every download this week
Do Weight Loss Gummies Actually Work?
Weight loss gummies are heavily marketed online, but the evidence for their effectiveness is limited. Unlike prescription weight management medications licensed in the UK, most commercial gummies lack robust clinical trials proving they support significant weight loss. This guide explains what research shows about gummies, how they compare to evidence-based weight management options, and what actually works for sustainable weight loss according to NHS guidance.
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Calculate Your BMI Instantly
Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
What the Evidence Shows About Weight Loss Gummies
Most weight loss gummies available online contain ingredients like glucomannan (a soluble fibre), green tea extract, or caffeine. While these have some supporting research for minor appetite suppression or metabolism effects, the clinical evidence for meaningful weight loss is weak.
- Glucomannan may help with satiety if consumed with adequate water, but effects are modest
- Green tea extract shows minimal weight loss benefit in most trials
- Caffeine can increase alertness but does not reliably support weight loss without calorie deficit
- Most commercial gummies lack independent, large-scale clinical trials
- Unlike prescription GLP-1 medications used for weight management in the UK, gummies do not mimic natural hormones that regulate appetite
The NHS recommends sustainable weight loss through reduced-calorie diet and increased physical activity. Gummies alone are unlikely to create the calorie deficit needed for meaningful results.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
Prescription Weight Loss Options vs Over-the-Counter Gummies
In the UK, prescription weight management medications like Mounjaro (tirzepatide) and Wegovy (semaglutide) have rigorous clinical evidence. The STEP trial showed Wegovy helped participants lose an average of 15% body weight over 68 weeks alongside diet and exercise. Mounjaro showed similar or greater results in the SURMOUNT trial.
Weight loss gummies have not demonstrated comparable outcomes in peer-reviewed research. Prescription weight loss medication works by activating GLP-1 hormone pathways—a mechanism gummies cannot replicate. If you have a BMI of 30 or above (or 27+ with weight-related health conditions), your GP can assess whether prescription weight management is appropriate. Use our free BMI calculator above to check your starting point.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
Are weight loss gummies safe?
Most commercial gummies from reputable manufacturers are generally safe, but they lack rigorous safety testing. Always check ingredients and consult your GP if you take medications—some ingredients may interact. However, safety is not the issue; effectiveness is. Gummies simply lack evidence for meaningful weight loss compared to lifestyle changes or prescription medications.
Can I use weight loss gummies with prescription weight loss injections?
If you're prescribed Mounjaro or Wegovy, discuss any supplements or gummies with your prescriber first. These medications work by activating GLP-1 pathways and are most effective alongside a reduced-calorie diet. Adding unproven gummies is unnecessary and may delay progress. Focus on diet, activity, and your prescribed medication.
What's the difference between weight loss gummies and prescription weight loss medication?
Prescription medications like Wegovy contain semaglutide, a GLP-1 receptor agonist with clinical trial evidence showing 15%+ average body weight loss. Gummies contain unproven ingredients without comparable trials. Prescription medications require clinical assessment; gummies do not. Our GLP-1 weight loss calculator can help you estimate potential results with evidence-based options.
Do any weight loss gummies actually work?
No weight loss gummy has demonstrated significant, sustained weight loss in large clinical trials comparable to prescription medications or lifestyle intervention. Some ingredients may provide modest, temporary appetite suppression, but this doesn't translate to meaningful weight loss without a calorie deficit. NHS weight loss guidance focuses on diet and activity, not supplements.
What's the best way to lose weight according to NHS guidance?
The NHS recommends losing 0.5–1 kg per week through a reduced-calorie diet and increased physical activity. If you have a BMI of 30+, speak to your GP about specialist weight management services or prescription options. Use our free weight converter and BMI calculator to track your progress, and try our progress tracker to log your journey alongside evidence-based approaches.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.